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Glyphosate Volume 1, Contents 18 December 2013
Contents
1 Statement of subject matter and purpose for which this report has beenprepared and background information on the application.................................... 2
1.1 Context in which the renewal assessment report was prepared ................................... 21.1.1 Purpose for which the renewal assessment report was prepared ................................. 21.1.2 Arrangements between rapporteur Member State and co-rapporteur Member
State.............................................................................................................................. 21.1.3 EU Regulatory history for use in Plant Protection Products........................................ 21.1.4 Evaluations carried out under other regulatory contexts ............................................. 31.2 Applicant(s) information.............................................................................................. 41.2.1 Name and address of applicant(s) for approval of the active substance...................... 41.2.2 Producer or producers of the active substance............................................................. 81.2.3 Information relating to the collective provision of dossiers ........................................ 81.3 Identity of the active substance .................................................................................... 9
1.3.1 Common name proposed or ISO-accepted and synonyms .......................................... 91.3.2 Chemical name (IUPAC and CA nomenclature) ......................................................... 91.3.3 Producer's development code numbers ........................................................................ 91.3.4 CAS, EC and CIPAC numbers................................................................................... 101.3.5 Molecular and structural formulae, molecular mass.................................................. 101.3.6 Method of manufacture (synthesis pathway) of the active substance........................ 111.3.7 Specification of purity of the active substance in g/kg .............................................. 111.3.8 Identity and content of additives (such as stabilisers) and impurities ....................... 121.3.8.1 Additives .................................................................................................................... 121.3.8.2 Significant impurities ................................................................................................. 121.3.8.3 Relevant impurities .................................................................................................... 121.3.9 Analytical profile of batches ...................................................................................... 121.4 Information on the plant protection product .............................................................. 131.4.1 Applicant .................................................................................................................... 131.4.2 Producer of the plant protection product ................................................................... 131.4.3 Trade name or proposed trade name and producer's development code number
of the plant protection product ................................................................................... 131.4.4 Detailed quantitative and qualitative information on the composition of the
plant protection product ............................................................................................. 131.4.4.1 Composition of the plant protection product ............................................................. 131.4.4.2 Information on the active substances ......................................................................... 13
1.4.4.3 Information on safeners, synergists and co-formulants ............................................. 131.4.5 Type and code of the plant protection product .......................................................... 141.4.6 Function ..................................................................................................................... 141.4.7 Field of use envisaged................................................................................................ 141.4.8 Effects on harmful organisms .................................................................................... 141.5 Detailed uses of the plant protection product ............................................................ 151.5.1 Details of representative uses..................................................................................... 151.5.2 Further information on representative uses................................................................ 211.5.3 Details of other uses applied for to support the setting of MRLs for uses
beyond the representative uses................................................................................... 251.5.4 Overview on authorisations in EU Member States .................................................... 25
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2 Summary of active substance hazard and of product risk assessment ............... 27
2.1 Identity ....................................................................................................................... 272.1.1 Summary of identity................................................................................................... 272.2 Physical and chemical properties ............................................................................... 27
2.2.1 Summary of physical and chemical properties of the active substance..................... 272.2.2 Summary of physical and chemical properties of the plant protection product......... 272.3 Data on application and efficacy................................................................................ 272.3.1 Summary of effectiveness .......................................................................................... 272.3.2 Summary of information on the development of resistance ...................................... 272.3.3 Summary of adverse effects on treated crops ............................................................ 282.3.4 Summary of observations on other undesirable or unintended side-effects .............. 282.4 Further information .................................................................................................... 292.4.1 Summary of methods and precautions concerning handling, storage, transport
or fire .......................................................................................................................... 292.4.2 Summary of procedures for destruction or decontamination ..................................... 29
2.4.3 Summary of emergency measures in case of an accident .......................................... 292.5 Methods of analysis ................................................................................................... 292.5.1 Methods used for the generation of pre-authorisation data ....................................... 292.5.2 Methods for post control and monitoring purposes ................................................... 292.6 Effects on human and animal health .......................................................................... 332.6.1 Overall Summary ....................................................................................................... 342.6.2 Summary of absorption, distribution, metabolism and excretion in mammals.......... 372.6.3 Summary of acute toxicity ......................................................................................... 412.6.3.6 Eye Irritation .............................................................................................................. 432.6.3.7 Skin sensitisation........................................................................................................ 45
2.6.4 Summary of short-term toxicity ................................................................................. 462.6.5 Summary of genotoxicity ........................................................................................... 522.6.5.1 Invitro........................................................................................................................ 532.6.5.2 Invivo......................................................................................................................... 532.6.6 Summary of long-term toxicity and carcinogenicity ................................................. 562.6.7 Summary of reproductive toxicity ............................................................................. 662.6.7.1 Multi-generation studies ............................................................................................ 662.6.7.2 Developmental toxicity and teratogenicity ................................................................ 692.6.8 Summary of neurotoxicity ......................................................................................... 812.6.9 Summary of further toxicological studies .................................................................. 832.6.10 Summary of toxicological data on impurities and metabolites .................................. 85
2.6.11 Summary of medical data and information ................................................................ 872.6.12 Toxicological end point for assessment of risk following long-term dietary
exposure - ADI........................................................................................................... 912.6.13 Toxicological end point for assessment of risk following acute dietary
exposure - ARfD (acute reference dose).................................................................... 942.6.14 Toxicological end point for assessment of occupational and bystander risks
AOEL......................................................................................................................... 942.6.15 Summary of product exposure and risk assessment................................................... 962.7 Residues ..................................................................................................................... 982.7.1 Summary of storage stability of residues ................................................................... 982.7.2 Summary of metabolism, distribution and expression of residues in plants,
poultry, lactating ruminants, pigs and fish ................................................................. 992.7.3 Definition of the residue .......................................................................................... 1002.7.4 Summary of residue trials in plants and identification of critical GAP................... 101
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2.7.5 Summary of feeding studies in poultry, ruminants, pigs and fish............................ 1022.7.6 Summary of effects of processing............................................................................ 1022.7.7 Summary of residues in rotational crops.................................................................. 1022.7.8 Estimation of the potential and actual exposure through diet and other sources..... 1022.7.9 Proposed MRLs and compliance with existing MRLs ............................................ 1032.7.10 Proposed import tolerances and compliance with existing import tolerances......... 1042.8 Fate and behaviour in the environment.................................................................... 1052.8.1 Summary of fate and behaviour in soil .................................................................... 1052.8.1.1 Aerobic soil degradation .......................................................................................... 1052.8.1.2 Anaerobic soil degradation ...................................................................................... 1052.8.1.3 Soil photolysis .......................................................................................................... 1062.8.1.4 Field dissipation ....................................................................................................... 1062.8.1.5 Adsorption and desorption ....................................................................................... 1062.8.1.6 Predicted environmental concentrations in soil (PECSoil)........................................ 1082.8.2 Summary of fate and behaviour in water and sediment ........................................... 109
2.8.2.1 Hydrolysis ................................................................................................................ 1092.8.2.2 Photolysis ................................................................................................................. 1092.8.2.3 Ready biodegradability ............................................................................................ 1092.8.2.4 Water-sediment system ............................................................................................ 1102.8.2.5 Predicted environmental concentrations in surface water, sediment and
groundwater (PECSW, PECSedand PECGW) (IIIA 9.2.1, 9.2.3) ................................ 1112.8.3 Summary of fate and behaviour in air...................................................................... 1122.8.4 Summary of monitoring data concerning fate and behaviour of the active
substance, metabolites, degradation and reaction products ..................................... 1122.8.5 Definition of the residues relevant to the environment............................................ 1142.8.6 Summary of exposure calculations and product assessment ................................... 114
2.9 Effects on non-target species ................................................................................... 1152.9.1 Summary of effects on birds and other terrestrial vertebrates ................................. 1152.9.2 Summary of effects on aquatic organisms ............................................................... 1192.9.3 Summary of effects on arthropods ........................................................................... 1212.9.3.1 Effect on bees........................................................................................................... 1212.9.3.2 Effects on other arthropod species ........................................................................... 1212.9.4 Summary of effects on non-target soil meso- and macrofauna................................ 1222.9.5 Summary of effects on soil nitrogen transformation ............................................... 1232.9.6 Summary of effects on terrestrial non-target higher plants...................................... 1242.9.7 Summary of effects on biological methods for sewage treatment ........................... 125
2.9.8 Summary of product exposure and risk assessment................................................. 1262.10 Classification and labelling ...................................................................................... 1272.10.1 Proposals for the classification and labelling of the active substance ..................... 1272.10.2 Proposals for the classification and labelling of preparations (Annex IIIA 11.3
and 11.4)................................................................................................................... 1272.11 Relevance of metabolites in groundwater ................................................................ 1282.11.1 STEP 1: Exclusion of degradation products of no concern ..................................... 1282.11.2 STEP 2: Quantification of potential groundwater contamination............................ 1282.11.3 STEP 3: Hazard assessment identification of relevant metabolites ...................... 1282.11.3.1 STEP 3, Stage 1: screening for biological activity .................................................. 1282.11.3.2 STEP 3, Stage 2: screening for genotoxicity ........................................................... 128
2.11.3.3 STEP 3, Stage 3: screening for toxicity ................................................................... 1282.11.4 STEP 4: Exposure assessment threshold of concern approach............................. 1292.11.5 STEP 5: Refined risk assessment............................................................................. 129
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2.11.6 Overall conclusion ................................................................................................... 1292.12 Consideration of isomeric composition in the risk assessment................................ 1292.12.1 Identity and physical chemical properties................................................................ 1292.12.2 Methods of analysis ................................................................................................. 1292.12.3 Mammalian toxicity ................................................................................................. 1292.12.4 Operator and Worker exposure ................................................................................ 1292.12.5 Residues and Consumer risk assessment ................................................................. 1292.12.6 Environmental fate ................................................................................................... 1292.12.7 Ecotoxicology .......................................................................................................... 1302.13 Residue definitions................................................................................................... 1302.13.1 Definition of residues for exposure/risk assessment................................................ 1302.13.2 Definition of residues for monitoring ...................................................................... 131
3 Proposed decision with respect to the application .............................................. 133
3.1 Background to the proposed decision ...................................................................... 133
3.1.1 Proposal on acceptability against the approval criteria Article 4 and Annex IIof Regulation (EC) No 1107/2009 ........................................................................... 133
3.1.2 Proposal - Candidate for substitution....................................................................... 1533.1.3 Proposal Low risk active substance ...................................................................... 1543.1.4 List of studies to be generated, still ongoing or available but not evaluated........... 1553.1.5 Issues that could not be finalised ............................................................................. 1593.1.6 Critical areas of concern .......................................................................................... 1603.1.7 Overview table of the concerns identified for each representative use
considered ................................................................................................................ 1613.1.8 Area(s) where expert consultation is considered necessary..................................... 1643.1.9 Critical issues on which the Co-RMS did not agree with the assessment by the
RMS ......................................................................................................................... 1653.2 Proposed decision .................................................................................................... 1663.3 Rational for the conditions and restrictions to be associated with any approval
or authorisation(s), as appropriate............................................................................ 1673.3.1 Particular conditions proposed to be taken into account to manage the risks
identified .................................................................................................................. 167
APPENDICES ...................................................................................................................... 168
Appendix 1 - Guidance documents used in this assessment .................................................. 168Appendix 2 - Reference list.................................................................................................... 169
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Level 1
Glyphosate
Statement of Subject Matter andPurpose of Renewal Assessment Report
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1 Statement of subject matter and purpose for which this report has been
prepared and background information on the application
1.1 Context in which the renewal assessment report was prepared
1.1.1 Purpose for which the renewal assessment report was prepared
This renewal assessment report has been prepared in accordance with Commission Regulation(EC) No 1141/2010 and Guidance Document SANCO/10387/2010 rev. 8 in order to evaluatethe application and the collective supplementary dossier submitted by Monsanto Europe
N.V./S.A. on behalf of the European Glyphosate Task Force and to allow a decision on therenewal of the first approval of the active substance glyphosate.
According to Article 13 of Commission Regulation (EC) No 1141/2010, third parties could
submit information to contribute to the assessment. Submissions from Agrar Koordination,PAN Germany and Umweltinstitut Mnchen containing either individual scientific papers ora list of published literature were received within the period prescribed and also considered inthe evaluation.
1.1.2 Arrangements between rapporteur Member State and co-rapporteur Member
State
According to Commission Regulation (EU) No 1141/2010 Germany was assigned rapporteurMember State (RMS) and Slovakia assigned Co-rapporteur Member State (Co-RMS).
A first draft of the fate section parts route and rate of degradation in soil, adsorption,desorption and mobility in soil, predicted environmental concentrations in soil and ingroundwater as well as the review of the corresponding open literature were originally
provided by the Co-RMS Slovakia. A review undertaken by the RMS led to the determinationof different endpoints, particularly with regard to the kinetic evaluation of degradation rates insoil and with regard to adsorption in soil. As a consequence, these parts of the fate section andthe calculations of the predicted environmental concentrations in soil and in groundwaterwere revised, based on the assessment of degradation rates and adsorption in soil.
1.1.3
EU Regulatory history for use in Plant Protection Products
Glyphosate was first evaluated as part of the 1st stage of the work-programme for existingactive substances referred to in Article 8(2) of Council Directive 91/414/EEC with Germany
being the designated rapporteur Member State.
In 1995 three task forces submitted each a joint dossier:
(1) The Tulip task force, comprising AgriChem, Aragonesas Agro SA, Industrias Afrasas,Calliope, Sundat and TKI Pinus Race,
(2) Monsanto and Cheminova and(3) Barclay Chemicals and Portman Agrochemicals.Further individual dossiers were submitted by Feinchemie Schwebda GmbH, Marubeni UK
plc (Sinon EU Coorperation), Herbex Produtos, Quimicos Ltd, Luxan, I. Pi. Ci. Industrias
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Prodotti Chimici, Nufarm Limited, Alkaloida and Sanachem (subsequently DowAgroScience) all for glyphosate and Zeneca Agrochemicals (Syngenta) for glyphosatetrimesium salt. Nufarm and Alkaloida officially withdrew their notifications prior toconclusion of the evaluation process.
The task force Monsanto/Cheminova as well as Feinchemie Schwebda GmbH wereconsidered main data submitters for glyphosate. Zeneca Agrochemicals (Syngenta) was maindata submitter for glyphosate trimesium.
Following a peer review organised by the European Commission glyphosate was included inAnnex I of Council Directive 91/414/EEC with Commission Directive 2001/99/EC (OJ L304/14, 21.11.2001), entering into force on 1 July 2002. According to Regulation (EU) No540/2011 glyphosate is deemed to have been approved under Regulation (EC) No 1107/2009as well.
The overall conclusions of the evaluation of glyphosate, as finalised by the StandingCommittee on Plant Health on 29 June 2001, were provided in the Review Report(Glyphosate; SANCO/6511/VI/99-final, 21 January 2002).
The peer review concluded that only uses as herbicide may be authorised. These conclusionswere reached within the framework of the following uses, which were supported by the maindata submitters:
- herbicide against terrestrial annual weeds, perennial weeds and shrubs in fruit, vegetables,forestry, grassland, ornamentals and arable crops as well as non-crop uses
In agreement with Article 4 of Regulation (EC) No 1141/2010 Monsanto Europe N.V./S.A.on behalf of the European Glyphosate Task Force(www.glyphosatetaskforce.org) submittedan application to Germany as RMS and Slovakia as Co-RMS notifying the intention to renewthe exsisting approval of glyphosate on 24 March 2011.
A collective supplementary dossier from the Glyphosate Task Force comprising 24 applicantswas submitted on 25 May 2012.
In agreement with Article 4 of Regulation (EC) No 1141/2010 GAT Microencapsulation AGsubmitted an application to Germany as RMS and Slovakia as Co-RMS notifying the
intention to renew the exsisting approval of glyphosate on 25 March 2011. This applicationcontained several deficiencies. According to Article 6 (3) of (EC) No 1141/2010 the applicantwas given a period of 14 days to render the application compliant. Thereupon the applicantwithdrew the application on 20 April 2011.
1.1.4 Evaluations carried out under other regulatory contexts
Pesticide residues in food2004 evaluations. Part II. Toxicological. WHO/PCS/06.1. WorldHealth Organization, Geneva, 2006
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1.3 Identity of the active substance
1.3.1 Common name proposed or ISO-accepted and synonyms
Active ingredient: Glyphosate
Related salt-types: Glyphosate- isopropyl-amine-salt
Glyphosate-potassium-salt
Glyphosate-ammonium-salt
Glyphosate-dimethylammonium-salt
1.3.2 Chemical name (IUPAC and CA nomenclature)
Glphyosate:
Glyphosate-isopropyl-amine salt:
IUPAC: N-(phosphonomethyl)glycine - isopropylamine (1:1)orisopropylammoniumN-(phosphonomethyl)glycinate
CAS: N-(phosphonomethyl)glycine compound with 2-propanamine (1:1)
Glyphosate-potassium salt:
IUPAC: potassiumN-[(hydroxyphosphinato)methyl]glycine
CAS: N-(phosphonomethyl)glycine potassium salt (1:1)
Glyphosate-ammonium salt:
IUPAC: ammoniumN-[(hydroxyphosphinato)methyl]glycine
CAS: N-(phosphonomethyl)glycine monoammonium salt
Glyphosate-dimethylammonium salt:
IUPAC: N-(phosphonomethyl)glycine - dimethylamine (1:1)ordimethylammoniumN-(phosphonomethyl)glycinate
CAS: N-(phosphonomethyl)glycine compound withN-methylmethanamine (1:1)
1.3.3 Producer's development code numbers
With the submission of the "renewal"-dossier no explicite codes were given in Document M.
IUPAC: N-(phosphonomethyl)glycine
CAS: N-(phosphonomethyl)glycine
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1.3.4 CAS, EC and CIPAC numbers
Glphyosate:
CAS 1071-83-6
EC (EEC) 213-997-4CIPAC 284
Glyphosate-isopropyl-amine salt:
CAS 38641-94-0
EC (EEC) 254-056-8
CIPAC 284.105
Glyphosate-potassium salt:
CAS 70901-20-1
EC (EEC) Not attributed
CIPAC 284.019
Glyphosate-ammonium salt:
CAS 40465-66-5
EC (EEC) Not attributed
CIPAC 284.007
Glyphosate-dimethylammonium salt:
CAS 34494-04-7
EC (EEC) Not attributed
CIPAC 284.102
1.3.5 Molecular and structural formulae, molecular mass
Glyphosate:
Molecular formular: C3H8NO5PMolar mass: 169.1 g/mol
Structural formula:
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Glyphosate-isopropyl-amine salt:
Molecular formular: C6H17N2O5P
Molar mass: 228.18 g/mol
Structural formula:
Glyphosate-potassium salt:
Molecular formular: C3H7NO5PK
Molar mass: 207.18 g/mol
Structural formula:
Glyphosate-ammonium salt:
Molecular formular: C3H11N2O5P
Molar mass: 186.1 g/mol
Structural formula:
Glyphosate-dimethylammonium salt:
Molecular formular: C5H15N2O5P
Molar mass: 214.15 g/mol
Structural formula:
1.3.6 Method of manufacture (synthesis pathway) of the active substance
Confidential information, see Annex C.
1.3.7 Specification of purity of the active substance in g/kg
950 g/kg as stipulated in Regulation (EU) No 540/2011.
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1.3.8 Identity and content of additives (such as stabilisers) and impurities
1.3.8.1 Additives
None.
1.3.8.2 Significant impurities
Confidential information, see Annex C.
1.3.8.3 Relevant impurities
Open.
1.3.9 Analytical profile of batches
Confidential information, see Annex C.
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1.4.5 Type and code of the plant protection product
Soluble concentrate (SL)
1.4.6
Function
Herbicide.
Glyphosate is a non-selective post-emergence, mono- and dicotyledonous herbicidal activesubstance.
1.4.7 Field of use envisaged
Herbicides containing glyphosate are commonly used for the control of annual and perennialmono- and dicotyledonous weeds and woody plants in agriculture, horticulture, viticulture,forestry, orchards, plantation crops, amenities, home gardening and greenhouses. Furthermoreit is used for weed control on aquatic areas, on hard surfaces, on railways, along roads, and onnon cultivated areas. Besides weed control, herbicides containing glyphosate are also used forthe control of suckers, for the destruction of grassland before renewal and for harvestmanagement (desiccation) in various crops.
1.4.8 Effects on harmful organisms
Glyphosate is a non-selective herbicidal active substance, belonging to the chemical class ofglycines, with no or only low soil residual activity. Glyphosate is taken up by the leaves andother green parts of the plant and is translocated systemically (apoplastic and symplastic) inthe whole plant, also in underground parts like roots, rhizomes or stolons. Glyphosate kills the
plant by blocking the shikimic acid pathway. Glyphosate binds to and blocks the activity ofits target enzyme EPSPS (5-enolpyruvylshikimate-3-phosphate synthase), an enzyme of thearomatic amino acid biosynthetic pathway. The inhibition of the enzyme prevents the plantfrom synthesising the essential aromatic amino acids needed for protein biosynthesis. Actionat the shikimic acid pathway is unique to glyphosate and the absence of this pathway inanimals is an important factor of its low vertebrate toxicity.
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1.5 Detailed uses of the plant protection product
1.5.1 Details of representative uses
Glyphosate containing products are used at rates as shown in the following table and controlthe most important dicot species like Cirsiumspp., Chenopodium album andRubus sppandmonocot species such asElytrigia repens, Alopecurus myosuroides and Sorghum halepenseinstubble, cereals, peas, bean,oilseed rape, flax, mustard, orchards, pasture, forestry andindustrial weed control.
There are various methods of application of glyphosate formulations including tractor-mounted hydraulic sprayers (Spray volumes ranging between 100 and 400 L for most uses.This is in line with the GAP supported for the renewal of glyphosate), hand held sprayersincluding rotary atomizers (ULV) and knapsacks, aerial (limited in the EU to Hungary for
pre-harvest application in specific conditions in maize and sunflower only), weed wipers(rope wick) and cut stump treatments for trees. Specialised application techniques includeshielded sprayers, spot applicators, brush applications to tree stumps, stem injections for treesand to persistent weeds such as Japanese knotweed and ready-to-use sprayers for the homeand garden sector.
Applications are designed to avoid contact with the crop, with the exception of pre-harvestapplications.
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List of representative uses evaluated (Glyphosate)
Crop and/
or situation
(a)
Member
State or
Country
Product name F
G
or
I
(b)
Pests or
Group of pests
controlled
(c)
Formulation Application Application
Type
(d-f)
Conc.
of as
(i)
method
kind
(f-h)
growth
stage &
season
(j)
number
min max
(k)
interval
between
applications
(min)
L/ha
product*
min max
wa
m
All crops**
(all seededor
transplanted
crops)
EU F Emergedannual,
perennial andbiennial weeds
SL 360g/L Spray Pre planting ofcrop
1-2 21d (seeremark)
1-6 1
All crops**
(all seededcrops)
EU F Emergedannual,
perennial andbiennial weeds
SL 360g/L Spray Post planting/pre emergence
of crop
1 1-3 1
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Crop and/
or situation
(a)
Member
State or
Country
Product name F
G
or
I
(b)
Pests or
Group of pests
controlled
(c)
Formulation Application Application
Type
(d-f)
Conc.
of as
(i)
method
kind
(f-h)
growth
stage &
season
(j)
number
min max
(k)
interval
between
applications
(min)
L/ha
product*
min max
wa
m
Cereals
(pre-
harvest)wheat, rye,
triticale,
EU F Emerged
annual,perennial andbiennial weeds
SL 360g/L Spray Crop maturity
< 30 % grainmoisture
1 2-6 1
Cereals
(pre-harvest)
barley andoats
EU F Emergedannual,perennial and
biennial weeds
SL 360g/L Spray Crop maturity
< 30 % grainmoisture
1 2-6 1
Oilseeds
(pre-
harvest)rapeseed,
mustardseed,linseed
EU F Emergedannual,
perennial andbiennial weeds
SL 360g/L Spray Crop maturity
< 30 % grainmoisture
1 2-6 1
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Crop and/
or situation
(a)
Member
State or
Country
Product name F
G
or
I
(b)
Pests or
Group of pests
controlled
(c)
Formulation Application Application
Type
(d-f)
Conc.
of as
(i)
method
kind
(f-h)
growth
stage &
season
(j)
number
min max
(k)
interval
between
applications
(min)
L/ha
product*
min max
wa
m
Orchardcrops,
vines,including
citrus &tree nuts
EU F Emergedannual,
perennial andbiennial weeds
SL 360g/L Spray Post emergenceof weeds
1-3 28d 2-8 1
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Crop and/
or situation
(a)
Member
State or
Country
Product name F
G
or
I
(b)
Pests or
Group of pests
controlled
(c)
Formulation Application Application
Type
(d-f)
Conc.
of as
(i)
method
kind
(f-h)
growth
stage &
season
(j)
number
min max
(k)
interval
between
applications
(min)
L/ha
product*
min max
wa
m
Orchardcrops,
vines,including
citrus &tree nuts
EU F Emergedannual,
perennial andbiennial weeds
SL 360g/L (ULV)
Sprayer or
Knapsackuse (spot
treatment)
Post emergenceof weeds
1-3 28d 2-8 0
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Crop and/
or situation
(a)
Member
State or
Country
Product name F
G
or
I
(b)
Pests or
Group of pests
controlled
(c)
Formulation Application Application
Type
(d-f)
Conc.
of as
(i)
method
kind
(f-h)
growth
stage &
season
(j)
number
min max
(k)
interval
between
applications
(min)
L/ha
product*
min max
wa
m
Remarks: (a) For crops, the EU and Codex classifications (both) should be used; where relevant, the use
situation should be described (eg.fumigation of a structure)(b) Outdoor or field use (F), glasshouse application (G) or indoor application (I)
(c) eg. biting and suckling insects, soil born insects, foliar fungi, weeds(d) eg. wettable powder (WP), watersoluble granule (WG)(e) GCPF Codes - GIFAP Technical Monograph No 2, 1989
(f) All abbreviations used must be explained(g) Method, eg. high volume spraying, low volume spraying, spreading, dusting, drench
(h) Kind, eg. overall, broadcast, aerial spraying, row, individual plant, between the plants - type ofequipment used must be indicated
(i) g/kg or g/l
(j) Growth stage at last treatment (BBCH MBlackwell, ISBN 3-8263-3152-4), inclu
application(k) The minimum and maximum number o
must be provided
* former information on kg as/hL replace(l) PHI - minimum pre-harvest interval
(m) Remarks may include: Extent of use/ec
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1.5.3 Details of other uses applied for to support the setting of MRLs for uses beyond
the representative uses
None.
1.5.4 Overview on authorisations in EU Member States
Some examples of glyphosate formulations currently registered in some countries of the EUare listed below:
Country Trade Name Approval
number
Concentratio
n
Salt of
glyphosate
Formulation
type
Roundup 7400057 360 g/L IPA SL
Clinic 9800499 360 g/L IPA SL
Roundup Max 2020293 450 g/L IPA SL
France
Sting 2X 9400527 270 g/L IPA SL
Clinic 9206/B 360 g/L IPA SLBELGIUM
Roundup Turbo 9344/B 450 G/L IPA SL
ROUNDUP
ULTRAMAX
005191-00 450 G/L IPA SLGERMAN
Y
ROUNDUP TURBO 004960-00 680 G/KG AMMONIUM SG
ROUNDUP
BIAKTIV
02.2059/1/2010 360 G/L IPA SL
ROUNDUP MEGA 02.5/10493-
1/2010
450 G/L POTASSIUM SL
HUNGARY
DOMINATOR
EXTRA
04.2/3239-2011 480 G/l DMA sl
ITALY HOPPER 480 14969 480 G/l DMA sl
SPAIN ROUNDUP
ENERGY PRO
22959 450 G/L POTASSIUM SL
SWEDEN cLINIC 360 SL 4378 360 G/L IPA SL
ENVISION MAPP 10569 450 G/L IPA SL
ROUNDUP KLIK MAPP 12866 450 G/L POTASSIUM sl
ROUNDUP MAX MAPP 12952 680 G/kG AMMONIUM SG
UK
GLYFOS 480 MAPP 10996 480 g/L IPA SL
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Level 2
Glyphosate
Summary ofactive substance hazard andof product risk assessment
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2 Summary of active substance hazard and of product risk assessment
2.1 Identity
2.1.1
Summary of identity
All data concerning the identity address sufficiently the requirements of Annex IIA andAnnex IIIA.
2.2 Physical and chemical properties
2.2.1 Summary of physical and chemical properties of the active substance
Glyphosate and its salts (IPA, K, NH4) are water soluble solids at room temperature withoutany explosive or oxidising properties.
2.2.2 Summary of physical and chemical properties of the plant protection product
MON52276 is a SL formulation without any explosive or oxidising properties that is stablefor two years under the conditions applied (original container, at 20 C).
2.3 Data on application and efficacy
2.3.1 Summary of effectiveness
Glyphosate controls the most important annual dicotyledonous species, for example Cheno-podium album, biennial species such as Cirsium spp. and perennial dicotyledonous weedssuch asRubus spp. In addition glyphosate controls annual monocotyledonous species such as
Alopecurus myosuroides and perennial monocotyledonous weeds including Sorghumhalepense and Elytrigia repens in stubble, cereals, peas, beans, oilseed rape, flax, mustard,orchards, pastures, forestry and industrial weed control. For some species efficacy is notsufficient.
2.3.2 Summary of information on the development of resistance
Looking at the situation in Europe in more detail, currently 10 cases of resistance are known,encompassing five different weed species, the dicotyledonous Conyza bonariensis,C. canadensisand C. sumatrensis, as well as the monocotyledonousLolium multiflorumand
L. rigidum.So far, resistant biotypes have been found exclusively in orchards, vineyards or olive groves(Italy, Spain and France) or on railways (Czech Republic). All cases have been reported fromthe last seven years, indicating a growing impact of glyphosate resistance. The most serious
problem seems to be L. rigidumwith reported cases from four different countries including ahigh number of affected sites. Apart from one case (C. canadensis) in the Czech Republic,
Northern and Central Europe are not affected by glyphosate resistance up to now.
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For all glyphosate-resistant weed species from Europe, research has shown that theseparticular biotypes may also be cross-resistant to other HRAC Group G herbicides. Multipleresistance seems to be a serious issue in the case of some glyphosate-resistant weeds outsideEurope where resistance to up to four different herbicide groups (different modes of action)
has been detected.However, the design of the respective crop rotations and the associated frequency ofglyphosateapplication may differ in the various Member States. A national assessment of theagronomic risk is therefore recommended. Compared to arable crops, there therefore seems to
be a higher risk for resistance development in perennial systems, under non-crop situations oron railways, as glyphosate may be used as the only herbicide.
2.3.3 Summary of adverse effects on treated crops
In plants, glyphosate inhibits the shikimic acid pathway. Glyphosate binds to and blocks the
activity of its target enzyme EPSPS (5-enolpyruvylshikimate-3-phosphate synthase), anenzyme of the aromatic amino acid biosynthetic pathway. The inhibition of the enzymeprevents the plant from synthesizing the essential aromatic amino acids (e.g. phenylalanine,tyrosine, tryptophane) needed for protein biosynthesis. This reduces the production of proteinin the plant, and inhibits plant growth. Because EPSPS is present in all plants, all crops, withthe exception of genetically modified plants tolerant to glyphosate, are usually sensitive toglyphosate. In the normal crop rotation no effects are expected on any succeeding crops.
2.3.4 Summary of observations on other undesirable or unintended side-effects
In soils, glyphosate will be adsorbed quickly onto soil particles and inactivated. However,glyphosate can become unbound again in small amounts. The impact of this on plants and soilmicroorganisms has not been completely clarified. In soils (field), DT50varies from 3 to 174days depending on edaphic and climatic conditions. The major metabolite in soil isaminomethylphosphonic acid (AMPA).
Findings have shown that glyphosate can be transferred from the roots of target plants to therhizosphere and non-target plants can also be influenced (e.g. reduced absorption ofmicronutrients Mn and Fe deficiency). Glyphosate is a strong chelator to various divalentcations such as Ca, Fe, Cu and Mn. Glyphosate binds micronutrients in the soil and can causemicronutrient deficiencies in plants that increase their susceptibility to disease, especially on
soils with pure nutrient content. However, the available scientific data suggest that the strongaffinity of glyphosate and its metabolite AMPA to most soils prevents the uptake of thesecompounds by root systems of non-target plants.
There is a risk of crop damage using glyphosate in direct drilling systems. To avoidphytotoxic effects on crops in pre-emergence uses seeds must be totally covered with soil.
Glyphosate can reduce some beneficial organisms such as saprophytic fungi that decomposedead plant material and are important for soil fertility. Studies have shown that glyphosatestimulates the growth of a number of fungal pathogens that cause diseases in crops.
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2.4 Further information
2.4.1 Summary of methods and precautions concerning handling, storage, transport or
fire
Adequate information on methods and precautions concerning handling, storage, transport orfire is available.
2.4.2 Summary of procedures for destruction or decontamination
Adequate information on destruction or decontamination is available.
2.4.3 Summary of emergency measures in case of an accident
Adequate information on emergency measures in case of an accident is available.
2.5 Methods of analysis
2.5.1 Methods used for the generation of pre-authorisation data
Methods for the determination of the active substance and the impurities in the technicalmaterial are available.
2.5.2 Methods for post control and monitoring purposes
Methods to ensure the monitoring and enforcement of the respective limits are notcompletelyavailable.
For the assessment of the analytical methods for the determination of glyphosate residues thefollowing criteria were used:
- Mean recovery rates at each fortification level in the range of 70 to 110 % with a relative
standard deviation of 20 %
- No interfering blanks (< 30 % of the LOQ)
- Methods must employ the simplest approach, involve the minimum cost, and requirecommonly available equipment.
- The enforcement method for food must be suitable for the determination of all compoundsincluded in the residue definition and must be checked in an independent laboratory.
- The enforcement methods for environmental matrices must be able to analyse for allcompounds of toxicological and/or ecotoxicological significance in soil, water and air.
- An additional confirmatory method for all matrices is supplied.According to these criteria adequate analytical methods are listed in the Table 2.5-1.
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Table 2.5-1: Methods for the determination of residues
Matrixty
pe
Matrix Residue
component
Method Limit of
quantification
Reference
Crop Plums, limes, corn
forage, corn grain,corn stover, corn oil,corn flour, corn grits,
corn starch, corn
meal, soybeanforage, soybean seed,
soybean hay,
soybean oil, soybeanmeal, soybean hulls
Glyphosate
and N-acetyl-glyphosate
LC-MS/MS of
underivatisedanalytes with
phenyl-hexylcolumn;
m/z 17088(glyphosate),m/z 21288 (N-acetyl-glyphosate)
0.05 mg/kg Pentz and Bramble
(2007a), DuPont-15444
(ASB2008-2635)
Crop Grapes, soybean seed Glyphosateand N-acetyl-
glyphosate
LC-MS/MS ofunderivatised
analytes with
phenyl-hexyl
column;m/z 17088(glyphosate),
m/z 212170 (N-acetyl-glyphosate)
0.05 mg/kg Seal and Dillon
(2007), DuPont-21313(ASB2008-2637)
Crop Flax,
cabbage,
melon,oat grain,
rye straw,
coffee
Glyphosate GC-MS afterderivaization with
trifluoroacetic
anhydride andhetafluorobutanol,
BPX-5 column,
m/z 612
0.05 mg/kg Anderson and Ely,2001; RAM 328/01
(ASB2012-12364)
Crop Corn grain,soya forage,nutmeat
Glyphosate GC-MS afterderivaization withtrifluoroacetic
anhydride and
hetafluorobutanol,DB-5 column,
m/z 611.5
0.05 mg/kg Alferness and Wiebe,2001,Interlaboratory
method validation
study
(ASB2012-12387)
Crop Barley grain,
barley straw
maize green plantmaize corn
sugar beet root
Glyphosate HPLC with
postcolumn
derivatization andfluorescence
detection
0.05 mg/kg Klimmek, 2007
DFG Method 405
(ASB2008-5606)
Crop Oil seed rape,
citrus fruit
Glyphosate HPLC with
postcolumnderivatization andfluorescence
detection
0.05 mg/kg Klimmek and Weber,
2008DFG Method 405(ASB2008-5607)
Crop Potato, carrot, onion,
cucumber, cabbage,
cauliflower, lettuce,leek, tomato
Glyphosate LC-MS/MS, Bio-
Rad Fast Acid
column, ESI-,m/z 16868,m/z 16879
0.05 mg/kg Weber, 2012
(ASB2012-12489)
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Matrixty
pe
Matrix Residue
component
Method Limit of
quantification
Reference
Animalmatrices
Whole milk, skimmilk, cream, whole
egg, egg yolks, egg
whites, muscle
liver, kidney, fat,
Glyphosate
and N-acetyl-glyphosate
LC-MS/MS of
underivatisedanalytes with
phenyl-hexylcolumn;m/z 17088(glyphosate),
m/z 21288 (N-acetyl-glyphosate)
0.025
0.05
mg/kg
mg/kg
Pentz and Bramble
(2007), DuPont-21372
(ASB2008-2636)
Animalmatrices
milk, eggs, muscle
liver
Glyphosateand N-acetyl-
glyphosate
LC-MS/MS ofunderivatised
analytes with
phenyl-hexyl
column; ESI+m/z 17088(glyphosate),
m/z 21288 (N-acetyl-glyphosate)
or ESI-, m/z
16863(glyphosate)
0.025
0.05
mg/kg
mg/kg
Karnik and Dillon
(2007), DuPont-20009
(ASB2008-2634)
Animal
matrices
Egg Glyphosate GC-MS after
derivaization with
trifluoroaceticanhydride and
hepta-
fluorobutanol,
HP-5 MS column,m/z 612
0.01 mg/kg Clarke and Robinson,1998
(ASB2012-12398)
Animal
matrices
Milk,
egg,
meat
Glyphosate GC-MS afterderivaization with
trifluoroacetic
anhydride andtrifluoroethanol,
CPSil 19 column,
m/z 411
0.05 mg/kg Schneider, 2001 a(MET2005-367)
Soil Loamy sand Glyphosate GC-MS after
derivaization withtrifluoroacetic
anhydride and
trifluoroethanol,
CPSil 19 column,m/z 411
0.05 mg/kg Schneider, 2001 b
(MET2005-371)
Soil Szuter Glyphosate GC-MS after
derivaization with
trifluoroaceticanhydride and
hetafluorobutanol,
XTI-5 column,
m/z 611
0.05 mg/kg Szuter, 1996
(MET2000-699)
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Matrixty
pe
Matrix Residue
component
Method Limit of
quantification
Reference
Water Drinking water,ground water,
surface water
Glyphosate LC-MS/MS after
derivatization with9-
fluorenylmethyl-chlorformate(FMOC), Synergi
Fusion RP
column, m/z390168, m/z390150
0.03 g/L Knoch, 2010
(ASB2012-12445)
Water Drinking water Glyphosate LC-MS/MS after
derivatization with
9-fluorenylmethyl-
chlorformate
(FMOC), Synergi
Fusion RP column, m/z 390168,m/z 390150
0.03 g/L Geschke, 2011
(ASB2012-12426)
Air Air, 35 C / 80 % rel.
humidity, 6 h
Glyphosate GC-MS after
derivaization withtrifluoroacetic
anhydride and
trifluoroethanol,
CPSil 19 column,m/z 411
5 g/m3 Schneider, 2001 c
(MET2005-371)
This overview shows that an analytical method using HPLC-MS/MS is available for the
determination of glyphosate and N-acetyl-glyphosate in all kinds of plant matrices with anLOQ of 0.05 mg/kg. This method is validated by a second laboratory, but does not allow thesimultaneous confirmation of results. For confirmatory purposes a laborious GC-MS methodis available, which does not allow the determination of N-acetyl-glyphosate.
A similar HPLC-MS/MS method was validated by two independent laboratories for thedetermination of residues of glyphosate and N-acetyl-glyphosate in all kinds of animalmatrices. The LOQ of this method is 0.025 mg/kg in milk and egg and 0.050 mg/kg in liver,kidney and fat. Confirmatory methods are usually not available for animal matrices.
For the determination of residues of glyphosate in environmental matrices analytical methodsare available.
The following methods for monitoring are missing:
A confirmatory method for glyphosate in fat and kidney/liver.
A confirmatory method for N-acetyl-glyphosate in dry plant materials and those withhigh water and high fat content.
A confirmatory method for N-acetyl-glyphosate in all kinds of animal matrices.
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2.6 Effects on human and animal health
Methodological approach
This health evaluation of glyphosate is based on the following sources and approaches:
More than 150 toxicological and ADME studies that had not been reviewed on EUlevel before were submitted by the Glyphosate Task Force (GTF) and became subjectto thorough evaluation.
All toxicological and ADME studies that had been reported in the previous EUevaluation were re-evaluated by the RMS according to current quality standards(taking into account most recent OECD and EU test guidelines, if available)
All toxicological studies were only used for risk assessment when regarded as
acceptable or at least supplementary from a todays perspective. Justifications fordisregarding now studies that had been formerly taken into consideration are given inthe respective sections of Volume 3.
A huge amount of more than 900 scientific publications (published since 2000 untilAugust 2013) and other relevant information was additionally considered.
All these publication were assessed for relevance, quality and reliability and wereused for risk assessment only on condition that the respective criteria had been met.
Introductory remarks to the evaluation in Volume 1
If the mean daily dietary intake of the test substance was different for male and femaleanimals in toxicological feeding studies, the lower value is given, except that the
NOAELs/LOAELs were based on effects occurring in only one sex.
Because of the large number of studies, summary tables for acute toxicity (with skinirritation and sensitisation) and some parts of genotoxicity testing are included only inVolume 3.
Where possible, on the basis of all reliable studies and information, it was tried to
establish overall NOAELs/LOAELs for a specific toxicological endpoint takingdose spacing into account.
With regard to open literature, it should be noted that a major part of the publicationsis on plant protection products (PPP) or formulations which are different from therepresentative one.
In many publications, the title or the conclusions are misleading because it is claimedthat the active substance (a.s.) glyphosate had been tested but actually it was a specificformulation. Composition of the tested products, apart from glyphosate content, was
mostly not reported Therefore, this data is of limited value for this toxicologicalevaluation that is focussed on the active ingredient
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Despite the very high number of papers, only certain endpoints have been investigatedand testing was performed often in vitro or sometimes in vivo using non-standardmethods.
However, taken in the whole, the published data suggest a higher toxicity of certainformulations as compared to glyphosate itself.
2.6.1 Overall Summary
Following oral administration to rats, glyphosate is rapidly absorbed from the gut but only toa limited extent of approximately 20 %. The absorbed portion is widely distributed withhighest concentrations occurring in bone, kidneys and liver. Its elimination via urine is fastand complete, predominantly within 48 h. There is virtually no metabolism of absorbedglyphosate in rats. Unabsorbed substance is excreted in faeces, mostly unchanged, with only a
small amount transformed to aminomethylphosphonic acid (AMPA). There is no evidence ofaccumulation of glyphosate. This pattern of toxicokinetics and metabolism is independent ofsex, dose level, or repeated administration.
The acute toxicity of glyphosate was low via oral, dermal and inhalativ routes of exposureand in all species tested. The oral and dermal LD50 was above 2000 mg/kg bw and theinhalative LC50was greater than 5 mg/mL air. Glyphosate was not irritating to rabbit skin and
proved negative in all tests for skin sensitisation using different methods. However,glyphosate acid proved severely irritating to the eyes. Eye irritation properties of theglyphosate salts are much weaker.
In repeated dose studies in several species, it was noted that the high dose effects in thevarious studies may be quite different, depending on species, strain, laboratory or perhapsalso the purity / impurities of the test substance. A part of these different effects may be dueto acidic properties of glyphosate.
The short-term toxicity of glyphosate was rather low in all species under study and by allroutes of administration. Oral subchronic studies revealed a maximum NOAEL of around400 mg/kg bw/day in rats, of approximately 300 mg/kg bw/day in dogs and of approximately500 mg/kg bw/day in mice. Toxic effects were confined to approximately 600 mg/kg bw/dayand above. Severe toxicity resulting in mortality was observed in one dog study at the doselevel of 1000 mg/kg bw/day when administered in capsules. Another dog study failed toconfirm these effects. Dietary administration was generally tolerated better.Target organs in the different species were the gastrointestinal tract (irritation with diarrhea orat least loose stool; in rats also distention, increased organ weight and mucosal atrophy of thecaecum), the bladder (cystitis), and the parotid salivary glands (histological findings). Inaddition, effects on body weight gain, food consumption and efficiency or on red blood cell
parameters were observed. Alterations in clinical chemistry parameters suggested weak toxiceffects on the liver which were not supported by histopathological observations.In subacute dermal studies on rats and rabbits, no systemic effects and only slight dermalirritation were observed up to the highest dose levels of 1000 or 5000 mg/kg bw/day.
The potential genotoxicity of glyphosate was tested in an adequate range of in vitro and invivostudies providing no evidence of a genotoxic potential.
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In long-term studies in rats, glyphosate was not carcinogenic. 100 mg/kg bw/day isconsidered to represent an overall NOAEL, based on combined assessment of fourindependent studies. The overall LOAEL was 350 mg/kg bw/day. Effects on body weight and
body weight gain, an increase in liver and salivary glands weight, alterations in clinical
chemistry parameters (e.g.,increase in AP activity and lower urine pH), histological salivarygland changes mainly of the parotis, cataracts and stomach mucosa irritation or caecumdistention were observed but not consistently in all studies.
In the mouse, non-neoplastic effects resembled those in rats but were accompanied by liverpathology and epithelial hyperplasia of the bladder with an overall NOAEL of 150 mg/kgbw/day. All findings were confined to 800 mg/kg bw/day or above.In one long-term study, an increase in the incidence of malignant lymphoma in male mice wasobserved at the highest dose level of 1460 mg/kg bw/day (10 000 ppm). This type of tumor isquite common in aging mice and was also found in a high incidence in the control group ofthis study. There was no statistically significant increase in the incidences of malignant
lymphoma in 4 other studies even in the higher dose range of up to 40000 ppm (4348 mg/kgbw/day).Therefore, glyphosate was considered unlikely to pose a carcinogenic risk in humans.
In a multitude of reproductive toxicity studies in rats, the overall NOAEL was approximately300 mg/kg bw/day for both parental and offspring toxicity if all available studies are takeninto account. Parental effects in the different studies and generations occurred at a LOAEL ofapproximately 670 mg/kg bw/day and above and comprised increased food and waterconsumption, lower body weight gain and an increase in incidence and severity of cellularalteration of the parotid and submaxillary salivary glands. In offspring, body weight gain wasreduced and, in one study, preputial separation was delayed at an exaggerated dose level.
Regarding reproductive toxicity, the only finding was a decrease in homogenisation resistantspermatids in the cauda epididymidis in one study in F0 males receiving the limit dose levelof 1000 mg/kg bw/day. Based on this effect, the NOAEL for reproductive toxicity was 351mg/kg bw/day. Reproductive performance was not altered.
The developmental toxicity studies in rats revealed an overall NOAEL for both maternal anddevelopmental effects of 300 mg/kg bw/d based on clinical signs and reduced body weightgain in the dams and increased incidences of foetuses with delayed ossification and skeletalanomalies at 1000 mg/kg bw/day. In conclusion, the newly submitted studies confirmed the
previous evaluation that there is no teratogenic potential of glyphosate in rats.
In rabbits, the overall NOAEL for maternal toxicity was 50 mg/kg bw/day, based on mortalityand gastrointestinal disturbances from 100 mg/kg bw/day onwards. The lowest NOAEL fordevelopmental effects was also established at 50 mg/kg bw/d, based on post-implantation lossat 200 mg/kg bw/day. Other developmental foetal effects comprised lower foetal weight and adelay in ossification.In a developmental study in rabbits at a dose of 450 mg/kg bw/day, causing marked maternaltoxicity, a slightly increased incidence of interventricular septal defects was observed. In allfurther acceptable developmental studies, this finding was not confirmed. However, excessivetoxicity including maternal mortality at comparable dose levels. was reported, making theevaluation difficult. It was concluded that there is no increased risk for foetal heart effects atlevels of exposure below those that caused severe maternal toxicity.
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Based on all reproductive and developmental toxicity studies, glyphosate was not consideredteratogenic in rats or rabbits and is unlikely to cause reproductive or teratogenic effects inhumans.
Glyphosate was not neurotoxic in rodents. As expected because of its chemical structure, thecompound proved negative for delayed neuropathy in chicken. No evidence of immuno-toxicity was obtained in a dietary study in mice.
The major soil and plant metabolite aminomethyl phosphonic acid (AMPA) was extensivelyinvestigated in acute, short-term and developmental studies and mutagenicity assays. It wasnot genotoxic and was found to be of equal toxicity as the parent compound.
In epidemiological studies in humans, there was no evidence of carcinogencity and there wereno effects on fertility, reproduction and development or of neurotoxicity that might beattributed to glyphosate. Poisoning incidents following accidental or suicidal ingestion of
glyphosate formulations rather reflect the toxicity of the products (due to co-formulants) andcannot be directly assigned to the active substance itself. Transient irritation has beensometimes observed following direct eye contact or inhalative exposure.Glyphosate has been found in the urine of operators and consumers, however, the measuredvalues suggest a received systemic dose that is by orders of magnitude below the proposedreference values and, thus, there is no health concern.
In farm animals such as goat and cattle, the clinical picture of systemic intoxications afteradministration of high doses was mainly characterised by gastrointestinal and neurologicalsigns with mortality occurring at lower dose levels (minimum lethal dose of 790 mg Round-up/kg bw/day) than in rats.
Glyphosate was found in the urine of cows, mostly likely because of residues in their diet, butthe systemic intake was very low with a wide margin of safety to doses that might causeclinical signs in cattle. Because the same enzyme (EPSPS) as in plants might be inhibited inmany bacteria, there was concern about possible alterations in the composition of microbialcommunities and microbial metabolism in the rumen eventually resulting in disease.However, a new study in an artifical rumen system has shown that no adverse effects onanimal health are to be anticipated.
The proposed ADI and AOEL for glyphosate are both based on the lowest NOAEL formaternal and developmental toxicity in the rabbit at 50 mg/kg bw/day since this was the most
sensitive animal model. Applying the safety factor of 100, the resulting ADI is 0.5 mg/kg bw.
The ADI for glyphosate is applicable also to AMPA if health evaluation of residues is needed.
For setting the AOEL, correction for 20 % oral absorption must be made. Accordingly, anAOEL of 0.1 mg/kg bw/day was established.
An ARfD is not warranted because glyphosate was of low acute toxicty and since there wasno evidence that the effects seen in the studies with repeated administration might be caused
by a single dose.
There is sufficient data available to prove that the toxicity of plant protections productscontaining glyphosate may be higher than that of the active ingredient. Most likely, this is dueto certain co-formulants which may enhance the toxicity of the formulations. In particular,
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there is reliable evidence that polyethoxylated (POE) tallowamine surfactants may be decisivethe toxicity of some formulations.To facilitate a comprehensive risk assessment of products that contain both glyphosate and aPOE-tallowamine and to ensure sufficient protection of operators, bystanders, workers,
residents and consumers, reference values were established for the substance with CAS no.61791-26-2 since this one was considered particularly toxic. A systemic AOEL, an ADI andan ARfD in the same magnitude of 0.1 mg/kg bw(/day) have been proposed. Furthermore, aninhalative AOEL of 0.0166 mg/kg bw/day was derived.
2.6.2 Summary of absorption, distribution, metabolism and excretion in mammals
The previous EU evaluation of glyphosate concluded that, following oral administration,glyphosate was rapidly absorbed from the gastrointestinal tract but only to a limited extent.This assumption was based on rather low elimination in the urine (DAR, 1998, ASB2010-
10302). Meanwhile, data obtained in bile-cannulated rats ( 1996,ASB2012-11380; , 1996, TOX2000-1981) have demonstrated a negligible biliaryexcretion. Since the pulmonary route of elimination is also of no importance (< 0.2 %) asshown by (1995, ASB2012-11379), (1996, ASB2012-11380) and (1996, TOX2000-1980), the systemically available glyphosate wasconfirmed to be excreted nearly exclusively in the urine. Thus, the extent of urinary excretionmay be considered the most appropriate measure for oral absorption. In the past, an oralabsorption rate of around 30 % was estimated, based mainly on studies by Powles and
(1992, TOX9300343) and (1988, TOX9552356). The study by(1996, ASB2012-11380), provided confirmation of this estimate, at
least for the low dose level that is usually considered for this parameter. However, a number
of other experiments of a comparable high quality ( 995, ASB2012-11379; Davies,1996, TOX2000-1977; 1996, TOX2000-1979) suggested a lower oral absorption.These findings are in line with data of (1995, TOX9650071) that also included acomparison of excretion following oral and intravenous administration in the same study.Further confirmation came from a study in bile-cannulated rats receiving a high dose( 1996, TOX2000-1981). The reasons for these apparent differences (see Table2.61a and 2.61b) are not kown but the studies providing lower values must not bedisregarded. Thus, 20 % is proposed as an appropriate estimate of oral absorption that is wellin the middle of the percentage of urinary excretion in the various studies. This figure should
be used for correction when the systemic AOEL has to be calculated, instead of 30 % asapplied before (EU, 2001, ASB2009-4191).
Rapid absorption and distribution was confirmed by pharmacokinetic parameters. Peakplasma levels were observed within 4 6 h and elimination from blood and plasma was rapidwith no evidence of accumulation in blood cells. A biphasic pattern of elimination from
plasma has been suggested in several studies and terminal half lives of 8 10 hours have beenestimated. Radiolabel in plasma was negligible after 24 h and not detectable any longer at168 h ( , 1995, ASB2012-11379; 1996, ASB2012-11380;see also 1988, TOX9552356; 1992, TOX9552358;and, in the literature, 2009, ASB2012-11542).
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Table 2.6-1a: Comparison of the distribution of radiolabelled glyphosate acid in
excreta and tissues (in %) and its metabolism in rats in studies that
were previously not evaluated in the EU
Excretion / Distribution (mean % of applied dose)
Urine Faeces Total organ /tissue /
carcass
residues
Bile
Referen-
ce, Study
identifi-
cation,
Owner
Dosing
regime and
dose levels,
length of
post-
observatio
n period
Metabolism
Single oral
gavage, 168
h; satellite
groups for
plasma
kinetics
10 mg/kg bw 22.5 19.4 74.6 84.3 0.33 0.27 -- --
(1995),
ASB2012-
11379;
Arysta
600 mg/kgbw
30.3 29.5 74.7 74.2 0.31 0.39 -- --
Very limited,
traces of AMPA
in urine (< 0.3%)
and of AMPA and
another compound
in faeces (
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Table 2.6-1b: Comparison of the distribution of radiolabelled glyphosate acid in
excreta and tissues (in %) and its metabolism in valid ADME studies
in the rat that were contained in the original DAR
Excretion / Distribution (mean % of applied dose)
Urine Faeces Total organ /
tissue /
carcassresidues
Bile
Referen-
ce, Study
identifi-
cation,
Owner
Dosing
regime and
dose levels,
length of
post-
observatio
n period
Metabolism
0.2 - 0.3
mg/kg bw,
single oral
dose, 168 h
12.3 9.6 82.9 83.3 -- -- -- --
200 mg/kg
bw, singleoral dose,
168 h
17.1 13.2 81.8 84.4 -- -- -- --
(1995)#,
TOX96500
71 /
(1995) #,
TOX95522
51;
Feinchemie
0.2 mg/kg
bw, single
i.v. dose, 168
h
90 88.6 5.6 7.2 < 0.1* < 0.1* -- --
No metabolites
found in urine
following oral
high dose
application
30 mg/kg bw,
single oral
dose, 168 h
29.0 30.7 58.8 56.5 0.62 0.64 -- --
1000 mg/kg
bw, single
oral dose,
168 h
30.6 22.4 53.3 60.4 0.47 0.40 -- --
30 mg/kg bw,
repeated
(14x) oral
application
followed by a
single
radiolabelled
dose, 72 h
34.3 34.6 49.6 46.7 0.96 0.83 -- --
(1992),
TOX93003
43;
Cheminova
30 mg/kg bw,
single i.v.
dose , 168 h
86.0 84.2 3.4 1.5 1.4 1.1 -- --
No metabolites
found in urine or
faeces
10 mg/kg bw,
single oral
dose, 168 h
28.6 22.5 62.4 69.4 0.48 0.36 -- --
1000 mg/kg
bw, single
oral dose,
168 h
17.8 14.3 68.9 69.4
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Distribution of the absorbed radioactivity into the organs and tissues was wide and rapid withgenerally low residues found in organs and tissues at termination. After a period of 3 to 7days following oral administration, total body burden accounted for equal to or less than 1 %of the applied radioactivity ( 1988, TOX9552356; p , 1992,
TOX9300343; 1996, TOX2000-1977, TOX2000-1978, TOX2000-1979; McEwen,1995, ASB2012-11379, 1996, ASB2012-11380). If measured, thehighest residues were detected in bone, followed by kidney and liver. Of course, due to poororal absorption, high amounts were also found in the gastro-intestinal tract (GIT). This patternof distribution was confirmed by whole-body autoradiograms that showed the greatestintensity of radioactivity in bone and gastrointestinal tract at up to 24 hours after dosingwhich was reduced to negligible amounts within 48 hours ( p 1992,TOX9552358; 1996, TOX2000-1980). A certain affinity to bone tissue is notunexpected for a phosporous compound. Although elimination from bone is slower than fromother tissues, the amount of radiolabel in bone after 168 h following a single oral dose was
relatively low accounting for 0.02 0.03 % of the applied dose ( 1995, ASB2012-11379).There was no evidence of a potential for accumulation in animals based on residue analysis inorgans and tissues after 72 h -168 h after single or repeated doses.
Elimination of ingested glyphosate via faeces urine was rapid and virtually complete by 72 168 hours with the major part being excreted within the first 48 hours. Because biliaryexcretion was negligible, it can be concluded that faeces contained unabsorbed glyphosateand enterohepatic circulation was of no importance.
This pattern of absorption, distribution and elimination was not significantly changed by dose
levels, by repeated administration of low doses or the sex of the test animals.
Most of the parent glyphosate is eliminated unchanged and only a small amount (less than 1%of the applied dose) is transformed to aminomethylphosphonic acid (AMPA). While AMPAis known to be the major metabolite of glyphosate in genetically modified plants and mayoccur also in soil and groundwater, its abundance in mammals has been shown to be verylimited and is assumed to be due to gastrointestinal microflora activity rather than mammalianmetabolic pathways ( 1991, TOX9551791). The metabolite AMPA has beentested in several toxicity studies which demonstrated that it is of lower toxicity thanglyphosate acid (see 2.6.8).
In a rather old (supplementary) study with dietary administration of glyphosate over 14 daysto rats ( 1973, TOX9552355), evidence of even a lower oral absorptionthan after gavage application was obtained. Total excretion was found equal to total intake.
A (supplementary) study in male rabbits ( 1973, TOX9552353)demonstrated a similar pattern of toxicokinetics and metabolism as in the rat.
Published information on toxicokinetics and metabolism of glyphosate in rats following oraladministration is scarce and, so far available, does not contradict the results from theregulatory studies ( 1991, TOX9551791; 1992,
TOX9551954; 2009, ASB2012-11542).
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Following dermal exposure, glyphosate is poorly absorbed ( 2012, ASB2012-11459)but the actual extent of dermal absorption depends very much on the product in which theactive ingredient is formulated. Therefore, it can be assessed only for the individual plant
protection products. Data on dermal absorption of glyphosate from the representative
formulation is presented under 2.6.14.
As for most pesticides, reliable kinetic data for glyphosate obtained in man is hardlyavailable. However, there is at least one publication that gives an idea of urinary excretion ofglyphosate after systemic (agricultural) exposure. As part of a study in occupationallyexposed farmers and there families in two U.S. states, glyphosate residues were analysed in24-hr composite urine samples taken from 48 farmers, their spouses and 79 of their children(aged 4 to 18) before, on the same day and three days after application of herbicidescontaining glyphosate. The geometric mean of glyphosate in the urine samples was 3 g/L (=3 ppb since values were given in the original report in this unit) and the maximum value in afarmer was 233 g/L. Examination of family members revealed that 4 % of the spouses and
12 % of the children had detectable urinary levels of up to 3 or 29 g/L (2004, ASB2012-11528). It may be concluded that urine is an important excretion route forglyphosate in humans following mainly dermal and/or inhalative exposure. Abundance ofglyphosate in urine indicates systemic exposure and measured values might be used as asuitable basis for calculation of the magnitude of exposure. Based on the extraordinarily highlevel of 233 g/L, the highest (individual) estimate for systemic intake in this study was 0.004mg/kg body weight, i.e., less than 1 % of the proposed ADI and approximately 4 % of the
proposed AOEL. For most participants, the received dose can be assumed to be much smaller.
In a more recent study in 182 citizens from 18 European countries ( 2013, ASB2013-8037), glyphosate was found in urine samples of nearly one half of the participants at a mean
concentration of 0.2 g/L (0.2 ppb) with a maximum value of 1.82 g/L and largeinterindividual differences. Although no details on recruitment of the participants, age, sex or
profession were given, it might be presumed that people excreting glyphosate have beenexposed via the dietary route. Based on these concentrations, a systemic dose may becalculated that is, for adults, always less than 0.1 % of the proposed ADI. Therefore, no healthconcern is anticipated.In addition, AMPA was found in more than one third of the samples (mean: 0.18 g/L,maximum: 2.63 g/L) but the concentrations were not correlated with those of glyphosate. Infacct, the source of these traces of AMPA is not known because there is virtually nometabolism of orally absorbed glyphosate. Since the ADI for glyphosate will also cover
AMPA, there is no health risk due to residues of this substance.
2.6.3 Summary of acute toxicity
Glyphosate acid and its salts have been extensively tested for acute toxicity, skin and eyeirritation, and skin sensitisation. An amount of 145 acute studies was submitted either for the
previous EU evaluation or in the present GTF dossier.In contrast to studies of other types, previously submitted acute studies were not re-evaluatedso far no concern regarding the toxicological endpoint has been arisen.
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2.6.3.1 Acute oral toxicity
For the previous EU evaluation, a large number of oral toxicity studies in rats and mice wassubmitted that had been conducted with either glyphosate acid or its salts. In the current GTFdossier, a variety of additional studies in rats with administration of glyphosate acid and twomore studies in rats and mice with the IPA salt were provided (see Volume 3, B.6.2.1). Thesestudies have not been reviewed before and confirm the low acute oral toxicity of glyphosateand its salts. General signs of oral intoxication were breathing difficulties, reduced activity,ataxia, piloerection, convulsions and hunched posture.
Overall, the studies on oral toxicity in rats and mice revealed LD50values of at least > 2000mg/kg bw and, therefore, classification according to criteria of DSD and CLP regulation isnot required.
2.6.3.2 Acute dermal toxicity
Similarly, for the previous EU evaluation, a multitude of dermal toxicity studies in rats andrabbits were provided using glyphosate acid and its salts. Additional studies in rats withglyphosate acid were submitted for the current re-evaluation that confirmed the low toxicityafter dermal exposure (see Volume 3, B.6.2.2).Isolated signs of toxicity were body weight loss, diarrhea and slight local effects. The newstudies revealed no mortality up to a dermal dose of 5000 mg/kg bw glyphosate acid in rats.
Overall, the studies on dermal toxicity in rats and rabbits submitted either for the previousevaluation or the current re-evaluation of glyphosate and its salts revealed LD50values of at
least > 2000 mg/kg bw/d. Therefore, classification according to criteria of DSD and CLPregulation is not required.
2.6.3.3 Acute inhalation toxicity
The former EU evaluation revealed the acute inhalation toxicity (LC50) of glyphosate acid andits IPA salt in rats to be above the limit test dose of 5 mg/L air. For the current re-evaluation,eleven inhalation studies with glyphosate acid and two with glyphosate salts were submittedthat confirmed the low acute inhalation toxicity of glyphosate and its salts (see Volume 3,B.6.2.3). Toxic signs after inhalative exposure were mainly irritation of the upper respiratory
tract, hyperactivity, increased or decreased respiratory rate, piloerection, loss of hair, wet fur,slight body weight reduction, slight tremor and slight ataxia. It is noteworthy that these signswere not consistently observed throughout the studies.Based on this huge number of validstudies in rats, the inhalative toxicity of glyphosate and its salts is unequivocally low andtherefore, classification according to criteria of DSD and CLP regulation is not required.
2.6.3.4 Acute intraperitoneal toxicity
Studies on acute intraperitoneal toxicity are not compulsory and no new studies for thecurrent re-evaluation have been provided. For the previous EU evaluation, supplementary
studies on intraperitoneal toxicity of glyphosate acid and salt (most probably IPA salt) in ratsand mice had been submitted (DAR, 1998, ASB2010-10302). These studies revealed a higertoxicity compared to other exposure routes with LD50 values down to 134 mg/kg bw. The
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